专业科技书籍中经常用一些符号表示一些变量及其所处状态;在地质矿产、石油行业书籍中这些符号有一些相对固定的用法,包括代表符号本身的字母及其大小写、正斜体等。正确使用这些符号对读者快速准确理解书稿内容起着画龙点睛的作用,同时对普及国家标准也有推动作用。1.变量的表 In technical books of science and technology, some symbols are often used to indicate some variables and their status. In the books of geology, mineral resources and petroleum industry, there are some relatively fixed usage of these symbols, including the letters of the symbol itself and its case, italics and so on. Correct use of these symbols plays a role of a finishing touch for readers to understand the content of the manuscript quickly and accurately, and at the same time promotes the popularization of national standards. 1. Variable table